{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03389_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Port Barrow, Louisiana | 1922 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"5"},{"label":"placed","value":"4"},{"label":"unplaced","value":"1"},{"label":"fit sources","value":"georef 3, snap:0 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p2__4 (tier 1, 30.10006,-90.99311 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Barrow, Louisiana | 1922 | sanborn03389_002 p1","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:56:17Z","modified":"2026-10-18T16:56:17Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1351.5,1912.0 597.5,1912.0 129.5,1912.0 30.7,1814.8 26.0,111.6 254.0,23.9 1539.5,16.1 1586.5,57.7 1597.9,392.9 1584.5,1889.3 1592.4,1901.9 1351.5,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[692.0,1020.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.994197,30.107576]}},{"type":"Feature","properties":{"resourceCoords":[1144.0,1167.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.993496,30.106949]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Barrow, Louisiana | 1922 | sanborn03389_002 p2 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T16:56:17Z","modified":"2026-10-18T16:56:17Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"582.8,1579.7 596.8,1621.5 624.8,1621.5 625.0,1621.5 625.0,1621.5 625.3,1706.2 678.3,1864.0 1549.7,1848.5 1610.0,831.1 1561.7,109.0 1519.5,39.1 1276.5,44.1 45.2,17.8 50.6,23.4 39.8,941.2 125.5,985.0 131.7,985.0 161.4,985.0 161.4,937.1 329.4,938.9 373.1,985.0 525.9,985.0 527.5,1147.5 613.8,1238.4 611.2,1579.8 582.8,1579.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[616.0,942.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.995939,30.104643]}},{"type":"Feature","properties":{"resourceCoords":[161.0,1396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.997224,30.104277]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Barrow, Louisiana | 1922 | sanborn03389_002 p2 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.56"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3940.0"},{"label":"split_canvas_w","value":"2128.4"},{"label":"split_canvas_h","value":"2546.0"}],"created":"2026-10-18T16:56:17Z","modified":"2026-10-18T16:56:17Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"476.5,1620.5 496.6,1620.5 499.2,1285.5 414.1,1196.8 412.4,1037.3 261.8,1038.2 218.6,993.2 53.0,992.4 54.1,1057.9 45.8,1591.1 241.8,1605.8 346.3,1552.8 464.1,1607.2 468.6,1620.5 476.5,1620.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,985.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.99688258372764,30.105079754079696]}},{"type":"Feature","properties":{"resourceCoords":[532.1,985.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.99587121026195,30.104633084574637]}},{"type":"Feature","properties":{"resourceCoords":[532.1,1621.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.99648512498861,30.103578101705967]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1621.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.99749649845431,30.104024771211026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Barrow, Louisiana | 1922 | sanborn03389_002 p2 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.53"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6486.0"},{"label":"split_canvas_w","value":"1549.2"},{"label":"split_canvas_h","value":"1166.0"}],"created":"2026-10-18T16:56:17Z","modified":"2026-10-18T16:56:17Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"368.0,1628.4 15.7,1676.8 13.2,1906.6 365.1,1907.5 368.0,1628.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1621.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.9981071956899,30.102386950668095]}},{"type":"Feature","properties":{"resourceCoords":[387.3,1621.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.9973682616357,30.102076679303657]}},{"type":"Feature","properties":{"resourceCoords":[387.3,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.99763926668894,30.10159504904797]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.99837820074313,30.101905320412406]}},{"type":"Feature","properties":{"resourceCoords":[364.3,1846.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.997621,30.101724]}}]}}]}